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SubjectQuestion for CXL Drivers and ACPI required for a CXL mem device?
Hi All,

I am trying to bring up a system with a CXL Type 3 device using Qemu.
I see that the device is visible in the operating system at the location:
/dev/cxl/mem0
And a persistent memory attached to the device at
/sys/bus/cxl/devices/mem0/pmem

But I am unable to understand how to use this memory (pmem).
How can the Linux map this Pmem instance to user space.
Also, CXL device can be a non persistent memory too. How will that be visible?

Which all drivers are necessary to use a CXL Type3 device as a memory
expander? Is there any ongoing development in the kernel?

Regards,
Samarth

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